What is Buttweld Fitting & its Types



What is Buttweld Fitting?
A buttweld fitting is a weldable pipe fitting that allows changing the pathway of flow, to reduce or increase the pipe bore size or attach auxiliary equipment. Forged Steel buttweld fittings are manufactured in accordance with ANSI / ASME B16.9.


Buttweld fittings are available in different grades, dimensions, and multiple shapes i.e. they are available in (elbows, tees, caps, reduces and outlets). These pipe fittings are the most common type of welded pipe fitting and are specified by nominal pipe size and pipe schedule
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Cast Iron, Aluminum, Glass, Rubber, Alloy, Stainless Steel, Carbon steel are some of the  most common materials used to produce a buttweld fitting, but to develop the shape of elbows, tees, reducers buttweld fittings use the seamless or welded pipe as the starting material which is then formed through multiple processes.

Some of the benefits of Buttweld fittings are;
  • The Welded connection helps to get a more robust connection
  • These fittings Have a Long Service Life.
  • Cheaper than socket weld.
  • A welded system utilizes minimum space.
  • Buttweld Fitting provides a permanent and a strong leak-proof piping connection.
  • Is Cost-effective compared to socket weld or threaded counterparts?
  • Continuous metal structure adds strength to the piping system
  • Provides the option of various turn radius by using the Long radius or short Radius
  • Because of its smooth inner surface buttweld fittings reduce the pressure and minimize the action of corrosion and erosion.
  • Butt-weld fittings with matching pipe schedules offer seamless flow inside the pipe. A full penetration weld and properly fitted LR 90 Elbow, Reducer, Concentric reducer, etc. offers gradual transition via welded pipe fitting.

Functions of Buttweld Fittings:


Buttweld pipe fittings help in assembling pipes, valves, and equipment to the piping system. Buttweld fitting also provides the following functions:
1.     Helps to join or connect pipes and equipment.
2.     Change the flow of direction in a piping system.
3.     Provide access to auxiliary equipment.

Different Types of Buttweld Fittings:

As we are now aware of what a buttweld fitting is let us now look at some of its most common types.



1.     Buttweld Elbow: Elbows are split into two groups that define the distance over which they change direction; the centerline of one end to the opposite face. This is known as the "center to face" distance and is equivalent to the radius through which the elbow is bent.


2.     Buttweld Tee:  Buttweld Pipe Tee is a type of pipe fitting with T-shaped having two outlets, at 90° to the connection to the mainline. It is a short piece of pipe with a lateral outlet. Pipe Tee is used to connect pipelines with a pipe at a right angle with the line. Pipe Tees are widely used as  pipe fittings


3.     Buttweld Cross: Butt-welded Pipe Fitting Cross is a fitting open from all four sides.



4.     Buttweld Reducers: A reducer fitting or adapter is used in pipe systems to connect straight sections of pipe or tube, adapt to different sizes or shapes, and for other purposes such as regulating fluid flow. 



5.     Buttweld End Caps: A buttweld pipe cap is used to blind or isolate the pipeline, permanently or temporarily (for example during the execution of maintenance and reparation works).



6.     Buttweld Bends:  The term “bend” refers to a fitting that changes the direction of the flow through the pipe works, without specifying the actual degree and direction.



7.     Buttweld Stub Ends lap joints: A Lap Joint Flange also knew as a loose flange is a two-piece a device that is similar to a weld-neck flange used in carbon or low alloy steel piping systems.



8.     Buttweld Nipples: In plumbing and piping, a nipple is a fitting, consisting of a short piece of pipe usually provided with a male pipe thread at each the end, for connecting two other fittings.


9.     Buttweld Coupling: A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. The primary purpose of couplings is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both.

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